Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 64760dfe43887c7ee4233ee3cdbfc623f09b525574ea4cfd5f89b14aa732a104:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^